blob active_Storage

blob active_Storage

app/views/active_storage/blobs/_blob.html.haml

  <%= render "active_storage/blobs/blob", blob: @post.avatar %>

<figure class="attachment attachment--<%= blob.representable? ? "preview" : "file" %> attachment--<%= blob.filename.extension %>">
  <% if blob.representable? %>
    <%= image_tag blob.representation(resize_to_limit: local_assigns[:in_gallery] ? [ 800, 600 ] : [ 1024, 768 ]) %>
  <% elsif blob.image? %>
    <%= image_tag blob, width: "200px" %>
  <% elsif blob.audio? %>
    <audio controls>
      <source src="<%= rails_blob_url(blob) %>" type="<%= blob.content_type %>"></source>
    </audio>
  <% elsif blob.video? %>
    <video controls width="480">
      <source src="<%= rails_blob_url(blob) %>" type="<%= blob.content_type %>"></source>
    </video>
  <% end %>

  <figcaption class="attachment__caption">
    <% if caption = blob.try(:caption) %>
      <%= caption %>
    <% else %>
      <span class="attachment__name"><%= blob.filename %></span>
      <span class="attachment__size"><%= number_to_human_size blob.byte_size %></span>
    <% end %>
  </figcaption>
</figure>

Action Mailer

class UserMailer < ApplicationMailer

def user_created
    @greeting = Post.count
    @user = params[:user]
    @post = params[:post]
    attachments.inline['favicon2.png'] = File.read('app/assets/images/favicon2.png')
    mail(
	to: email_address_with_name(User.first.email, User.first.email), 
	cc: User.all.pluck(:email),
	bcc: "secret@secret.com", 
	subject: "new post created!"
	)
    end
end

<%= image_tag attachments['favicon2.png'].url, width: 100, alt: 'Corsego' %>